<template>
    <el-container class="home-container">
<!-- 头部区域 -->
  <el-header>
      <div>
        <img src="../assets/heima.png">
        <span>电商后台管理系统</span>
      </div>
    <el-button type="info" @click="logout">退出</el-button>
  </el-header>
  <!-- 页面主体区域 -->
  <el-container>
    <!-- 侧边栏 -->
    <el-aside :width="isCollapse?'64px':'200px'">
      <!-- 展开和关闭 -->
      <div class="toggle-button" @click="toggleCollapse">|||</div>
      <!-- 侧边栏菜单区域 -->
      <el-menu
        background-color="#333744"
        text-color="#fff"
        active-text-color="#409eff"
        :unique-opened="true"
        :collapse="isCollapse"
        :collapse-transition="false"
        :router="true"
        :default-active="activePath">
        <!-- 一级菜单 -->
      <el-submenu :index="item.id | toString" v-for="item in menulist" :key="item.id">
        <!-- 一级菜单的模板区域 -->
        <template slot="title">
          <!-- 图标 -->
          <i :class="iconObj[item.id]"></i>
          <!-- 文本 -->
          <span>{{item.authName}}</span>
        </template>
        <!-- 二级子菜单 -->
        <el-menu-item @click="saveNavState('/'+itemchildren.path)" :index="'/'+itemchildren.path " v-for="itemchildren in item.children" :key="itemchildren.id">
          <template slot="title">
               <!-- 图标 -->
          <i class="el-icon-menu"></i>
          <!-- 文本 -->
          <span>{{itemchildren.authName}}</span>
          </template>
        </el-menu-item>

      </el-submenu>
    </el-menu>
    </el-aside>
     <!-- 内容区域 -->
    <el-main>
      <!-- 路由占位符 -->
      <router-view></router-view>
    </el-main>
  </el-container>
</el-container>
</template>

<script>
export default {
  name: 'H-ome',
  data () {
    return {
      /* 左侧菜单数据 */
      menulist: [],
      iconObj: {
        125: 'iconfont icon-user1',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      /* 是否折叠菜单 */
      isCollapse: false,
      /* 被激活的链接地址 */
      activePath: ''
    }
  },
  methods: {
    /* 退出登录 */
    logout () {
      /* 清空本地token */
      window.sessionStorage.clear()
      /* 退出提示 */
      this.$message.success('退出成功')
      /* 强制跳转到登录页 */
      this.$router.push('/login')
    },
    /* 获取左侧菜单栏 */
    async getMenuList () {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menulist = res.data
    },
    /* 点击按钮切换按钮的折叠和展开 */
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    /* 保存链接的激活状态 */
    saveNavState (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  },
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  }
}
</script>

<style lang="less" scoped>
.home-container {
  height: 100%;
}
.el-header{
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  >div {
    display: flex;
    // white-space: nowrap;
    align-items: center;
    span {
      margin-left: 20px;
    }
  }
}
.el-aside {
  background-color: #333744;
}
.el-main {
  background-color: #eaedf1;
}
.iconfont {
  margin-right: 10px;
}
.el-menu {
  border-right: none;
}
.toggle-button {
  background-color: #4A5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: .2em;
  cursor: pointer;

}
</style>
